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Hi Guys,
I recently had a site hacked with a .js file injected into the code. We removed the offending code but now the website opens sooo slowly. If the apache server is restarted the website opens perfectly but after a few hours it returns to being very slow again. I did a reverse dns lookup and the other sites on the server don’t suffer this speed issue suggesting its not a DoS attack. Any ideas of how to get my site working fast again. The site is built using EE 1.6.9. Could it be a caching issue or would you have any suggestions.
Any help appreciated.
Thanks

My suggestion would be to replace all of your files with a fresh copy. Take this as an opportunity to upgrade to EE 1.7. Be sure to manually clear all of your caches, too.

Ok thanks. What improvements will 1.7 bring and whats the best way to manually clear the caches?

Manually clearing the caches means using an FTP program and deleting every file/folder in the /system/cache folder except the index.html file.

http://expressionengine.com/legacy_docs/changelog.html#v170 has a list of what was changed in EE 1.70.